Maintenance
32
GUNE-SVX001A-EN
b. Average Duty—Annually after 3 years or
8,000 hours of operation.
c. Heavy Duty—Annually after 1 year or at least
1,500 hours of operation.
12. Check and test the operational functions of all safety
devices supplied with your unit.
Identification of Parts Tubular
Duct Furnace
Figure 24.
Tubular duct furnace, exploded view
D9373
1
2
3
4
6
7
8
9
10
14
12
13
11
15
16
17
20
21
22
23
24
25
26
27
28
30
29
31
AIR
FL
O
W
←
5
19
18
Table 13. Tubular duct furnace component index
1.
Vestibule panel/tube assembly
(heat exchanger)
2.
Manifold
3.
Manifold bracket/sub assembly
4.
Inshot burner
5.
Burner orifice
6.
Gas valve
7.
Gas inlet pipe
8.
Gas inlet grommet
9.
Flame sensor
10. Spark ignitor
11.
Control board
12. Transformer
13. Air pressure switch
14. Control sub-panel
15. Terminal block plate
16. High limit switch
17.
Flue collector
18. Flue collector gasket
19. Flue collector cover panel
20. Power vent assembly
21. Power vent extension/stand-off
22. Flue collar
23. Air inlet screen
24. Baffle
25. Top panel
26. Bottom panel
27.
Left side panel
28. Right side/Access panel
29. Rear panel
30. Front panel
31. Peep hole sight glass
